Method of regulating a thread separating device for separating threads from a warp



Oct. 1954 s. s. c. FLEISCHER 06 METHOD OF REGULATING A THREAD SEPARATING DEVICE FOR SEPARATING THREADS FROM A WARP Filed Dec. 11, 1952 5a 52 m M 282,8 5

"57 r b 9 p- 7 a 2 m 4 F\ 24 /2 r o A /4 2 I NVENTO/P SvEA/D 5/60/ 0 CHRIST/E FLEISCHER Patented Oct. 195 4- EE'ED STATES FATENT OFFICE Svend Sigurd Christie Fleischer, Charlottenlund, Denmark Application December 11, 1952, Serial No. 325,424

8 Claims.

The present invention relates to an improved method of regulating a thread separating device for separating threads from a Warp in which the threads are ordered or arranged in an end to end lease, and to a device for practicing the method.

When the threads in a warp shall be carried through the heddles of a loom, be tied to the threads of another warp, or the threads are to be provided with drop wires, the threads have to, be separated singly from the warp.

It is most important that the threads in a warp are relatively parallel and lie in proper sequence as otherwise faults may occur in the weaving process. That is especially to be avoided in weaving patterns and designs with multicolored material. In order to ensure the proper sequence of threads in a warp it is common practice to insert two lease cords, which are arranged in such a manner that the threads of the warp cross alternately over and under the one lease cord and under and over the other lease cord. Thus all the threads will cross each other between the two lease cords. This is in the following description as the threads being arranged in an end to end lease.

Separation of the threads may now take place in such an end to end lease by means of conventional devices known as cross pickers, so arranged that upon separation of any thread it moves that thread which at any moment forms the edge thread or" the a short distance from the warp while at the same time holding back the other threads of the warp. As soon as a thread is separated from the warp it is moved to other devices in the loom.

t may, however, happen that there is a fault in the crossing of the threads, e. g. several threads are collectively laid over and under the lease cords or one thread is missing, and in the first instance the cross picker will separate such assembled threads simultaneously, and faults in the weaving occurs.

The object of the invention is to provide a method by means of which it is possible to control the separation of threads singly from a Warp in which the threads are ordered in an end to end lease, when a fault in the crossing of the threads occurs.

A further object of the invention is to provide a method by means of which it is possible to control the separation of threads singly from a Warp in which the threads are ordered in an end to end lease, including stopping operation of the separating means when a fault in the crossing of the threads occurs.

A still further object of the invention is to provide a device for carrying out the method above mentioned.

Another object of the invention is to provide mechanical. means coacting with conventional thread separating devices for stoppin operation of the thread separating device when a fault in the crossing of threads in the warp ha occurred.

Yet another object of the invention is to provide mechanically operated means for interrupting the electric circuit by means of which the thread separating device is operated, when a fault in the crossing of the threads in a warp occurs.

These and other objects of the invention will be evident from the following description taken in conjunction with the accompanying drawing, in which:

Fig. 1 shows schematically and perspectively one manner of construction of a device according to the invention, provided with mechanical movements between the movable member and an elec trically operated switch for the driving motor for the device, and.

igs. 2 and 3 show two modified manners of construction of the device in which the movable member and the thread gripping member have electrical switches for interrupting the electrical current to the selector driving motor of the device.

The thread separating device may be of any known type of so-call d cross pickers. The thread separating device illustrated in the drawing is provided with two separator arms or elements i and 2 rigidly attached to a common shaft 5 journalled in bearings 3 and 4. The front ends la and 2a of arms I and 2 are each connected to lease cords 5 and respectively for crossing the threads of a warp in conventional manner. Each arm is attached to a tension spring 9 and M respectively in such a manner that the rear ends of the arms are held to abutment against cams ll and 92 respectively. These cams are rigidly attached to a driving shaft l5 journalled in bearings 13 and M, and upon rota tion the cams impart to the arms a rocking motion on shaft 5, the cams being so arranged that the arms rock in opposite directions. The bearings 3, 4 and I3, M are mounted on a suitable support or panel A schematically shown in the drawing, and having any adequate shape. Between arms I and 2 a third arm I6 is disposed. This arm it has at its one end an eccentric strap ll engaging an eccentric disc i8 rigidly attached to shaft 15. Ann H5 is arranged to rock on shaft 5 which is carried through a slot IS in the arm. The front end of arm It extends over the thread layer 8 and carries a wiper member 20.

When shaft [5 is caused to rotate the thread separating device operates in such a manner that the front end in of arm i moves up when the front end 2a of arm 2 moves down, so that the edge thread of the warp is moved out or engagement with the leases 6 and '5 which continue to engage the other t reads of the warp. A the same time the intermediate arm is performs a reciprocal rocking motion by which the wiper member as carries the released edge thread a short distance away from the warp to a position in which it may be engaged by o ier members for its further treatr" nt. Such other members are not included in the drawing.

After this displacement of the edge thread the movements arms i and 2 are reversed so that the front end Id of arm moves down while the front end 2a of arm 2 moves up, and the next thread in the warp is released and moved a short distance away from the warp, and the operation is repeated.

In case any mistake has occurred in the crossing of the threads in a warp so that two or more threads lie together in the cross, the thread separator will separate such assembled threads as a single thread from the other threads in the warp. Such an instance is illustrated in Fig. 1, where two threads 8a and 3b have been separated simultaneously and thus will give rise to a fault in the subsequent proper sequence of the threads unless the fault is rectified.

For this purpose the device is provided with a member 2i in the shape of a two-armed lever mounted on a fulcrum pin 22 rigidly attached to a part of the panel A. The one arm 23 of the lever is so disposed that upon simultaneous separation of threads to and 81) from th warp the separated threads slide under arm 23 to the eifect that the lever is moved to its position as shown in full lines, the arm being pressed slightly against the threads by means of a spring 26. The other arm 25 of lever 2! serves as a pawl.

To prevent further movement together of threads 8a and 8b a gripper Z6 is provided so shaped that it is only able to engage a single thread at a time, the gripper being provided with a needle 21 having a notch for a single thread. This needle 2? is exchangeable so that needles for any thread guage may be used.

The gripper 2 is rigidly attached to a pivot pin 28 rotatable in a bearing 29 on the panel A, and is provided with a depending arm to which by means of a spring 3| is held in abutment against the surface of a cam 32 rigidly attached to a shaft 33 rotatably journalled in bearings 35 and 35 on the panel A. Shaft 33 is driven through bevel gears 35 and 3'! from the driving shaft l5.

Upon rotation of shaft 33 the gripper 26 will swing up and down on pivot pin 28 in timed relation with the separator arms or elements so that the notched needle 2? on being moved down will engage the separated thread 8a and press it down out of the plane of the warp. If the thread separating device has only separated a single thread 8a from the warp, the lever 2i will be moved to its position as shown with dotted lines by means of spring 24, but in case the selecting device has simultaneously separated several threads from the warp, e. g. two threads 8a and 8b, lever 22! will be held in its position shown in full lines by means of the separated threads. To pivot pin 28 is furthermore attached a pawl 38 coacting with a rod 39 longitudinally displaceable in a guideway 50 on the panel A, and resting on a rocker arm 4 I. This arm M is arranged in such a manner that its one end is rotatably connected to a pivot pin 42 journalled in a fork 43 constituting the one arm 45 of a two-armed lever 44 mounted on a fulcrum pin 4'6 attached to the panel A. The other arm i! of lever 44 is acted upon by a spring 48 attached to the panel A, and by means of which the arm is held in a predetermined position. The rocker arm 41 is held in abutment against rod 39 by means of a spring 49 attached to the panel A. Arm 4? of lever 44 is provided with an electric contact member 50 coacting with another stationary contact member 5| by the action of spring 33. In this manner there is provided a driving motor circuit through wires 52 and 53 attached to contact members 50 and 5% respectively.

Every time the gripper 26 is depressed its needle engages a thread 8a and moves it out of the plane of the warp whereupon the gripper moves up again and presses rod 39 down. When the thread is moved out of the plane of the warp the lever 21 is moved to its position shown in dotted lines 1115 releasing the rocker arm so that the end 5 of this arm is pressed down by means of rod 39. If, however, the thread separating device has simultaneously separated threads 8a and 81) from the warp, thread 8b will retain member 2| in its position shown with full lines, in which arm 25 engages the extreme end 54 of the rocker arm ll thus preventing depression of this end. Consequently the other end of rocker arm 4! will be forced down thereby causing lever id to rotate on its fulcrum pin 46 and thus separate the contact members 58 and 5| to break the circuit through wires 52 and 53.

In the manner of construction shown in 1 the swinging motions of rocker arm 6| are utilized to break an electric circuit, but instead of this the oscillations of the arm may be utilized to operate a clutch device for disconnecting the driving mechanism of the device.

In the manner of construction of the device as shown in Fig. 2, the oscillatory member ii is provided with an electrical contact member TI, and the gripper 26 has an electrical contact 78. When the oscillatory member 2! is in its position as shown with full lines, and when the gripper 26 is in its depressed position, contacts 77 and Z8 abut their counterparts 19 and. 39 respectively to close a circuit through wires 56, 5? and 58 in series, and a source of current 59. In case the thread separating device has only separated a single thread from the warp, member 21 will be in its position shown in dotted lines, and the circuit will not be closed when gripper 26 reaches its lower position because contacts 7?, 1'9 are then separated. If, however, the thread separator has separated simultaneously more than one thread from the thread layer, e. g. threads Ba and 8b, thread 81) will retain member 25 in its position as shown with full lines and, when gripper 26 reaches its lower position, the circuit will be closed by the engagement of the contact '18, 8B. In the circuit is inserted an electric relay 50 which, when the circuit is closed, is excited to interrupt a motor circuit through wires El and 52 connected to a source of current 63, thus cutting out the motor operating the thread separating device. Thus this device will run continuously as long as only a single thread at a time is separated by the device, but it will be stopped the moment the thread separator, due to a fault in the crossing of the threads, separates more than a single thread at a time.

Fig. 3 illustrates a device in which the oscillatory member 2| is provided with a contact 65, and

the gripper with a contact 66. When the oscillatory member 2| is in its position as shown with dotted lines, and when the gripper 26 is in its depressed position, contacts 65 and 66 abut their counterparts 67 and 68 respectively, thereby closing two motor circuits in parallel, one through wires 62, '56, 7i and 12, the driving motor 13 and a source of current 74, the other through wires 69, 15, 76, 72, the driving motor and the source of current M. When two separated threads are moved beneath the arm 23 of the oscillatory member 2| this member will be moved to its position shown with full lines, so that the circuit including contacts 65 and 67 is interrupted. When the gripper 26 is moved to its lower position the circuit including contacts 66, 68 is interrupted, but if the thread separator has only separated a single thread the oscillatory member 2! will at the same time close the circuit including contact 65, 67. If, however, more than one thread is separated simultaneously the oscillatory member 21 will remain in its position shown with full lines so that both circuits are interrupted and the driving motor will be stopped.

I declare that what I claim is:

1. A device of the type described for separating threads singly from a warp in which the threads are arranged in an end to end lease comprising in combination thread separating elements associated With a warp in which there is a single ordinary cross over two cross members or lease cords, means for driving said elements, a thread-controlled member movable from inactive to active positions, spring means urging said member toward its inactive position, said member having a part disposed in the path of the separated thread or threads when the member is in its inactive position and moved by the separated thread against the tension of said spring means to dispose the member in its active position, a gripper movable transversely of the threads and having an end to engage a single separated thread at a time to move it laterally of the warp for subsequent treatment, whereby such movement of the single thread permits said spring means to move the member to its inactive position unless a surplus thread was separated with such single thread, means actuated from said driving means for moving said gripper in timed relation with said separating elements, and means to interrupt the operation of said driving means and arranged to coact with said movable member when this member is held against the action of said spring means in its active position by a surplus thread erroneously separated from the warp with the single thread to be separated.

2. The structure of claim 1 in which said driving means includes a movable interrupter the movement of which controls the starting and stopping of the driving means, and in which said movable member in one of its positions controls the operation of said interrupter.

3. The structure of claim 1 in which said driving means is electrically operated and includes an electric switch which controls the starting and stopping of the driving means, and in which said movable member controls the operation of said switch.

4. The structure of claim 1 in which said movable member is a two-armed lever, one arm of which forms said part disposed in the path of the thread to be separated, and in which the other arm of said lever coacts with said means to interrupt the operation of said driving means.

5. The structure of claim 4 in which said driving means includes a movable interrupter and means connecting the interrupter to power means which operates the thread separating elements, together with a spring loaded rocker arm which is pivotally connected at one end to said interrupter, means at the other end of said rocker arm to engage said other arm of the two armed lever member when the latter is in its active position, and a plunger coacting with the intermediate portion of the rocker arm and actuated by said gripper to move the pivoted end of said rocker arm against the action of its spring to move the interrupter for disconnecting the power means.

6. The structure of claim 4 in which said driving means is electrically operated and includes an electric switch which controls the starting and stopping of an electric motor which actuates mechanism for moving the thread separating elements, together with a spring-loaded rocker arm which is pivotally connected at one end to the movable part of said switch, means at the other end of said rocker arm to engage said other arm of the two-armed lever member when the latter is in its inactive position, and a plunger coacting with the intermediate portion of the rocker arm and actuated by said gripper to move the pivoted end of said rocker arm against the action of its spring to move the switch to open position for stopping the operation of the separating elements.

7. The structure of claim 4 in which said driving means is electrically operated and includes an electric motor, an electric circuit for said driving motor, a switch in said circuit, a second electric circuit, a relay in this second circuit controlling the aforesaid switch, a first contact device in said second circuit operated by means of said gripper, a second contact device in said second circuit operated by the said other arm of said two-armed lever member and closed by the latter when it is held in its inactive position by means of a surplus thread separated erroneously from the warp simultaneously with the single thread to be separated, to energize the relay and interrupt the circuit of the driving motor.

8. The structure of claim 1 in which said movable member is a lever one end of which forms said part disposed in the path of the thread to be separated, and in which said driving means is electrically operated by means of an electric motor, a first electric circuit for the driving motor, a con tact device in said circuit closed by the movement of said gripper to its thread displacing position, a second electric circuit for the same motor, another contact device in said second circuit arranged to be closed by means of said lever member when the latter is in its inactive position, and to be opened when said lever member is held disposed in its inactive position by means of a surplus thread separated erroneously from the warp simultaneously with the single thread to be separated.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,762,656 Fischer June 10, 1930 2,017,211 Klein Oct. 15, 1935 2,039,157 Fleischer Apr. 28, 1936 FOREIGN PATENTS Number Country Date 229,394 Switzerland Jan. 17, 1944 571.515 Germany Mar. 6, 1933 

